Core Tower Defense vs Undersoil
Price, ratings, monetisation and update history for both games, side by side โ with what reviewers say about each.
Core Tower Defense
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Zombies are marching on the energy core of New Terra, and you decide the road they take. Build a maze of nodes, line it with turrets and hold the core in this 3D sci-fi tower defense strategy game you can play offline on iPhone and iPad. BUILD THE ZOMBIES' PATH The twist on classic TD: you build the path. At the start of every level, lay nodes on the grid, and every node bends the route past your guns. Make the maze as long as you like, just never seal the core off. Between waves, add, upgrade and sell turrets. 7 TURRETS, 3 LEVELS EACH Machine Gun, Laser, Quad Gun, Rocket, Light Gun, Ice and Black Hole. Upgrade them in battle and unlock their special abilities, from Chain and Quad Explosion to Teleport. ELEMENTAL COMBOS Fire, ice, lightning and blue fire. When two elements hit the same zombie, they fuse into one of six combos such as Lightning Storm, Plasma and Frost Fire. 20 LEVELS ON NEW TERRA A lab parasite has turned the colonists into zombies. Fight from Pandora Research Center and Nova Station to the Endless Labyrinth and the Dark Zone, with a story quest on every level. ENDLESS SURVIVAL Six survival maps, waves that never stop and zombies that grow stronger every five waves. How long can your core hold? ZOMBIES THAT TEST YOUR MAZE Fast runners, element-immune zombies and bosses like the Brute push your defense to the limit. GROW YOUR ARSENAL Spend Skill Points, Blueprints, Titanium and Compensators on damage, range, fire rate and abilities. Earn badges, clear challenges and daily missions, and climb to level 100. PLAY YOUR WAY โข Play offline, on iPhone and iPad โข Pinch to zoom, drag to look around, speed waves up to 2ร Just one more level? Questions or ideas? Write to contact@skylinesgames.com.
Undersoil
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Somewhere under this beach is everything anyone ever lost. Undersoil is a pixel-art dig-and-collect game about the slow, satisfying business of finding things. Sweep a metal detector along the shoreline until a beam of light marks a spot. Dig it out. Carry it home. Brush the dirt away by hand and find out what you actually pulled up โ and how well it survived down there. Then the only decision that matters: sell it, or put it on a pedestal where everyone can see it. THE LOOP โข Sweep the sand until the detector finds something โข Dig it out on the tap bar before the dirt wins โข Carry the find overhead to the cleaning table โข Spray and scrub off the grime by hand to see what you've got โข Watch the condition land: OK, Fine, Good, Excellent, Mint or Pristine โข Sell it for cash, or display it and let it earn gold while you are gone 159 THINGS TO FIND Bottle caps and fish bones near the top. Crowns, meteorites and things that have no business being buried on a beach a long way below. Twelve rarity tiers run from Common to Primordial, and only your single best specimen of each earns a pedestal โ turn up a better one and the old one gets bumped. SIX LEVELS DOWN Home Beach is only the lid. Take the miner's cart down through The Undersoil, The Deep, the Lava Pools, the Sulphur Sink and the Abyssal Trench. Each level buries richer things and asks for better gear to get them out. GEAR THAT EARNS ITS KEEP Shovels, detectors, sprays and bags, five tiers deep at every level. A better detector finds more. A better shovel digs faster. A bigger bag means fewer walks back. A MUSEUM THAT PAYS Thirty pedestals on the sand. Everything you display earns gold in plain sight, and keeps earning while the app is shut. Tourists wander in to admire the good ones. ALSO โข Plays offline; cloud save keeps your progress if you reinstall โข No account, no sign-up, no email address โข Seventeen languages โข Free to play. Rewarded ads are always your choice, and there is never a full-screen ad in your first session.
Screenshots
Verdict
The clearest difference is update cadence: Undersoil at daily against Core Tower Defense's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Core Tower Defense sells 10 one-off in-app purchases and Undersoil sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Core Tower Defense ships an update every 2 months, Undersoil daily. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.
| Parameter | Core Tower Defense | Undersoil |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Daily โ better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 โ better | 15.1 |
| Further details โ not scored | ||
| Size | 196 MB | 70 MB |
| Age rating | 12+ | 4+ |
| Developer | MUHAMMED TAHA AKTAS | Connor Burns |
In-app purchases
Core Tower Defense
- Compensator 5$0.99
- Titanium 5$1.99
- Blueprint 5$2.99
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- Compensator 25$3.99
- Skill Point 11$5.99
- Life Core 11$5.99
- Titanium 25$7.99
- Blueprint 25$12.99
- Skill Point 130$49.99
- Life Core 130$49.99
Undersoil
- Gem Pouch$2.99
- Chest of Gems$9.99
- Vault of Gems$19.99
Questions
Is Core Tower Defense free?
Is Undersoil free?
Do Core Tower Defense or Undersoil have ads?
Which is updated more often, Core Tower Defense or Undersoil?
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